File-sharpening apparatus.



' No. 682,342. Patented Sept. ID, 19011. A. H. RADELL.

FILE SHARPENING APPARATUS.

(Application filed June 24, 1901.) {No.Modal.) 3 Sheets-Sheet I.

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No. 682,342. Patented Sept. I0, mm. A H BADELL FILESHARPENING APPARATUS.(Application filed June 24, 1901.)

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ANTHONY II. RADELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN M. FREES,OF SAME PLACE.

FILE 'SHARPENING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 682,342, datedSeptember 10, 1901.

Application filed June 24, 1901. Serial No. 65,858. (No model.)

To all whom it may concern:

Be it known that I, A'NTHONY H. RADELL, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in File-SharpeningApparatus, of which the following is a specification.

My invention relates to improvements in that class of machines in whichfiles are sharpxo ened by a stream of abrasive material mingled withwater and discharged into a suitable closed receptacle by a jet ofsteam, the steam escaping through a suitable opening and the mixed waterand abrasive material 1 5 returning by force of gravity to a receptacle,from which it is again drawn and discharged into the box by thesteam-jet over and over again.

One object of my invention is to provide to such a device which shall becompact, durable, and effective.

Another object of my invention is to provide means for automaticallypreventing the stoppage of the apparatus by the settling of 2 5 theabrasive material.

Another Object of my invention is to so construct the box that the steammay escape therefrom without carrying 01f any substantial quantity ofthe abrasive material, that the abrasive material after being dischargedinto the box will automatically return to a central point, from which itmay be readily redrawn for further use, that the supply of abrasivematerial may be readily renewed 3 5 from time to time withoutinterfering with the operation of the apparatus, and that the depth ofabrasive. material and water within the device may be automaticallyprevented from exceeding a fixed limit.

These and such other objects as may hereinafter appear are attained bythe devices illustrated in the accompanying drawings, in whicha Figure 1shows a longitudinal elevation of 5 my device. Fig. 2 is a plan Viewthereof.

Fig. 3 is a longitudinal section 011 the line 3 3 of Fig. 2. Fig. t isahorizontal section on the line at 4 of Fig. 3 looking in the directionindicatedbythearrows. Fig.5isacrosssection on the line 5 5 of Fig. 4looking in the direction indicated by the arrows. Fig.

6 is a detail of the injector. Fig. 7 is a detail showing the couplingbetween the supply and air pipes, and Fig. 8 is a detail in perspectiveof the injector end of thebox.

Like letters of reference indicate the same parts in the several figuresof the drawings.

Referring by letter to the: accompanying drawings, A is a table or othersuitable support, Within an opening in which rests the box B, formed,preferably,of metal, the lower portion of which is formed in the shapeof a hopper carrying the upper portion of any suitable form, one end ofwhich is provided with a funnel-shaped portion C,having square walls D,leading to the discharge-pipe E. The opposite end of the upper portionis provided with a removable door F, containing a tile opening G, overthe hopper portion of which opening depends a shield g. An opening 0 inone end of the hopper-shaped portion 0 communicates with a channel H,attached to the outer surface of one side of the hoppershaped portionand extending above the desired water-level.

I is a steam-pipe connecting with any suitable source of steam-supplyand leading to an injector J, the nozzle of which is located todischarge through the opening G below the shield 9 into the interior ofthe box B and against wooden impact plates or boards X, located in theinterior of the box 13. The suction-chamber of the injector J is in freecommunication with the supply-pipe K,which extends downwardly within thechannel H through the opening c into the bottom of the hopper C, atwhich point it connects with one end of a yoke L, the other end of whichyoke is connected with an air-pipe M, which extends upwardly from saidyoke through the opening 0' within the channel H and opens at its upperend into the atmosphere. The yoke L is provided with an inlet-opening e,which is in free communication with the bottom of the hopper C.

P is a feed-channel extending above the support A and-communicating withthe interior of the box B.

N is an overflow-pipe leading from the interior of the box B.

The operation of my device is as follows: A suitable amount of abrasivematerial mixed IOO with water having been put into the interior of thebox B and steam being turned on in the pipeIthe jet of steam dischargedthrough the injector J, operating on the well-known principle of theinjector, tends to create a vacuum within the vacuum or suction chamberof the injector, and so within the supplypipe K, in communicationtherewith. This in turn tends to draw the abrasive mixture through theopening 6 in the yoke L and upwardly through the supply-pipe K into theinjector, from which it is discharged with great abrasive force into theinterior of the box B and against the surface of a file (indicated indotted lines in Fig. 3) held between the shield. g and the nozzle of theinjector.

Obviously any material having sufficient hardness to abrade steeleffectively possesses a high specific gravity, and so the tendency isfor the abrasive material to settle to the bottom of the box and to thebottom of the water in the box, whereas for the effective operation ofthe apparatus it is highly desirable that the abrasive material shall beheld in suspension as thoroughly as possible, thus insuring a free flowof the abrasive material into the pipe K and out through the nozzle ofthe injector. One of the principal diiiiculties met within the practicaloperation of devices of this sort arises from this settling of theabrasive material and consequent clogging of the pipes and stopping ofthe operation of the apparatus. Various means have been devised forovercoming this difficulty, most of which have sought to bring thisabout by insuring a rapid return of the abrasive material to thesupply-pipe K after the discharge of the material through the nozzle,and thus by keeping up a rapid circulation to prevent the settling ofthe abrasive compound.

By the arrangement shown in the drawings, I have succeeded in making anapparatus which cannot be clogged by the settling of the material andwhich may be started without preliminary agitation, even after thematerial has settled quite solidly in the bottom of the box, as isalways the case when the machine is started in the morning after havingbeen out of use during the night. It has been found in practicaloperation that as the steam-jet is discharged from the injector J thepartial vacuum created thereby tends not only to draw abrasive materialthrough the inlet 6 of the yoke L, and so into the pipe K, but alsofreely draws air downward through the pipe M, thence through the yoke L,and upward into the pipe K, and so on. This not only preventsthesettling of the material in the box from clogging the pipe K, and thusinterfering with the operation of the injector and of the wholeapparatus, but if the material has become settled, so as to not flowfreely, the current of air drawn into the pipe M through the yoke L andup into the pipe K tends to draw and carry with it abrasive materialthrough the inlet e in the yoke L, and the active circulation of airthrough the pipe M, the yoke L, and the pipe K will always quicklyresult in starting a circulation of the abrasive material through theyoke L, the pipe K, the injector, and back into the box. In fact, whileI prefer with my device to use abrasive material mixed with water orother suitable liquid it is adapted for use with dry abrasive materials,if so desired. Owing to the hopper shape of the bottom of my box theabrasive material as it is discharged through the injector into the boxis promptly returned to a point immediately adjacent to theinlet-opening e in the yoke L. As the abrasive force of the jet ofabrasive compound and steam is very great, the impact-block X is veryrapidly worn away thereby. I therefore provide a portion of the innersurface of the box B with comparatively thin permanent blocks 00, uponwhich the large impact-block, preferably a block of wood from two tothree inches thick,is loosely laid, the shape of the box and theinclination at which the box is laid serving to hold the block in placeand yet allowing it to be readily and quickly removed and replaced by anew block.

While the attached drawings show my in vention embodied in its preferredform, my broad invention of using the supply-pipe, together with anair-inlet pipe substantially as shown, is capable of being embodied inmany different forms of apparatus of this nature, and, of course, is notlimited to a device in which the supply of material is drawn by thesupply-pipe from the interior of the same box into which the material isdischarged, and said pipes may be entirely within or entirely outside ofthe box, and various like modifications and adaptations of my inventionmay be made without departing from the spirit thereof.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a device of the class described, the combination with an injector,of a supplypipe connected with the suction chamber thereof and alsoconnected both with a source of supply and with an air-inlet pipe,substantially as described.

2. In a device of the class described, the combination with an injector,of a supplypipe connected with the injector and leading to a source ofsupply, and an air-inlet pipe leading to a point adjacent to thesupplyopening in said supply-pipe, substantially'as described.

3. In a device of the class described, the combination with a casinghaving a hoppershaped portion, of an injector arranged to discharge intosaid casing, a portable impact-plate arranged within said casing andopposite to the point of discharge from said injector, substantially asdescribed.

4. In a device of the class described, the combination with a casinghaving a hoppershaped portion, of an injector arranged to I dischargeinto said casing, a hood arranged 5 Within said casing and adjacent tothe discharge-nozzle of said injector, and a portable impact-boardarranged within said casing 0pposite t0 the point of discharge from saidinjector, substantially as described.

ANTHONY H. RADELL.

Witnesses:

F. H. DRURY, E. Y. GRIDLEY.

